STRUCT RAPL_PACKAGE_PMU_DATA(9)

💅 struct rapl_package_pmu_data(9) — Kernel API Manual

okay so bestie, welcome to struct rapl_package_pmu_data(9), straight out of the Kernel API Manual ✨. This is the per-package data for PMU support — think of it as the little backstage dressing room where one RAPL package keeps all its PMU stuff. Very main character energy, honestly 🎀.

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✨ NAME ✨

struct rapl_package_pmu_data — Per package data for PMU support. that's it, that's the vibe 🫶

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🌸 SYNOPSIS 🌸

struct rapl_package_pmu_data {
        u64 scale[RAPL_DOMAIN_MAX];
        raw_spinlock_t lock;
        int n_active;
        struct list_head active_list;
        ktime_t timer_interval;
        struct hrtimer hrtimer;
 };

no cap, that's the whole struct. look at her. iconic 👑

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🦋 Members 🦋

• scale — the scale of 2^-32 Joules for each energy counter increase. so every time a counter ticks up, this lil number tells you how much actual juice that tick is worth, in Joules, scaled by 2^-32 🔥
• lock — a raw_spinlock_t that protects n_active and active_list. it's giving bodyguard energy, lowkey 💪
• n_active — the number of active events. just a count, doing its best 😌
• active_list — the list of active events. a struct list_head, keeping everyone in line ✨
• timer_interval — the maximum timer expiration time before counter overflow. basically the deadline you cannot sleep past, or the counter goes 💀
• hrtimer — periodically updates the counter to prevent overflow. your girl is out here refreshing on a schedule so nothing spills over, we stan a proactive queen 🕐👑

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👀 SEE ALSO 👀

• Kernel file ./include/linux/intel_rapl.h
• struct rapl_if_priv(9)

go read those too, iykyk 🌈

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ngl bestie, treat timer_interval and hrtimer with respect — the whole point is that the counter gets updated before it overflows. miss that window and things go sideways, and not in a cute way 😭

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and that's the page, fr fr 🍓 this one lives in ./include/linux, and the page date is October 2026 — mwah, go forth and read headers 💜🧚